SED SED Set decimal mode SED
Operation: 1 -> D N V - B D I Z C
. . . . 1 . . .
+----------------+-----------------------+---------+---------+----------+
| Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
+----------------+-----------------------+---------+---------+----------+
| Implied | SED | $F8 | 1 | 2 |
+----------------+-----------------------+---------+---------+----------+